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Mastering The Art of
Measurement
User Guide for the Plusivo
DM401B Multimeter
Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01
www.plusivo.com

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  • Page 1 Mastering The Art of Measurement User Guide for the Plusivo DM401B Multimeter Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 2: Table Of Contents

    7.1 AC/DC Voltage Measurement 7.2 Resistance Measurement 7.3 Continuity Measurement 7.4 Frequency/Duty Measurement 7.5 Capacitance Measurement 7.6 Diode Test 7.7 Temperature Measurement 7.8 Non-contact AC voltage (NCV) Detection 7.9 Live Wire Detecting Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 3 In general, if something unusual happens or if you suspect that something is wrong or has malfunctioned, do not do anything with the product and immediately contact the seller for assistance (email address: office@plusivo.com) Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 4: Introduction

    In this guide, you are going to learn how to measure DC voltage and AC voltage, AC and DC current, resistance, diodes, frequency/duty, capacitance, temperature and continuity test using DM401B 6000 Counts T-RMS Smart Digital Multimeter. You are also going to learn how to use the Non Contact AC voltage test and the live wire test.
  • Page 5: Parts

    2. Parts Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 6: Display

    AC / DC Voltage measurement Resistance measurement Continuity measurement Diode measurement Capacitance measurement Frequency measurement Temperature measurement AC / DC Current measurement Non Contact Voltage Test Live Wire Test Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 7: Function Keys Description

    V Voltage unit μA, mA, A Current unit Resistance unit Ω, kΩ, MΩ Frequency unit mF, nF, μF Capacitance unit Temperature measurement (Celsius, Fahrenheit) 2.2 Function keys description Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 8: Reference Table

    1 million Kilo (k) 1 thousand No prefix 1 unit Milli (m) 1 thousandth −3 Micro (μ) 1 millionth −6 Nano (n) 1 billionth −9 Pico (p) 1 trillionth −12 Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 9: Technical Specifications

    Frequency response: 40 Hz~1kHz; TRMS 4.4 AC/DC current Range Resolution Accuracy μA μA ±(1.2% +3) 10 A 0.01 Overload protection: F10 A/250 V fuse Frequency response: 40 Hz~1k Hz; TRMS Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 10: Resistance

    6 kHz 0.001 kHz ±(1.0% +3) 60 kHz 0.01 kHz 600 kHz 0.1 kHz 6 MHz 0.001 MHz 10 MHz 0.01 MHz 1.0~99.0% 0.1% ±(1.0% +3) Overload protection: 250 V Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 11: Diode/Continuity

    " key for about 2 seconds to turn on or off the flashlight. 5.5 Backlight Press " " to turn on or off the backlight. Note: the VA display does not have this feature. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 12: Blown-Fuse Indicator

    4) When measuring resistance, if the resistance is less than about 50 Ω, the buzzer sounds and the indicator lights up. 5) Read the results from the display. NOTE: The minimum measured voltage in this mode is 0.8 V. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 13: Professional Measurement

    "COM" jack. 5) Contact the probe with both ends of the measured power supply (parallel). 6) Read the results from the display. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 14: Resistance Measurement

    "COM" jack. 4) Contact the probe with both ends of the measured power supply (parallel). 5) Read the results from the display. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 15: Continuity Measurement

    4) Contact the probe with both ends of the measured resistance or circuit (parallel). 5) When measuring resistance, if the resistance is less than about 50 Ω, the buzzer sounds and the indicator lights 6) Read the results from the display. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 16: Frequency/Duty Measurement

    "COM" jack. 4) Contact the probe with both ends of the measured power supply (parallel). 5) Read the results from the display. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 17: Capacitance Measurement

    "COM" jack. 4) Contact the probe with both ends of the measured power supply (parallel). 5) Read the results from the display. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 18: Diode Test

    5) If the polarity of the sensor is opposite to the polarity of the diode, the display will show "OL". 6) Read the results from the display. The measured forward voltage in this figure is 0.605 V Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 19: Temperature Measurement

    3) Insert the red probe into the jack and the black test lead into the "COM" jack. 4) The thermocouple probe contacts the measured object 5) Read the results from the display. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 20: Non-Contact Ac Voltage (Ncv) Detection

    5) When the strong electric field signal is detected, it will display "---H"; the buzzer will sound fast and the red light will turn on. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 21: Live Wire Detecting

    6) When the strong electric field signal is detected, it will display "---H"; the buzzer will sound fast and the red light will turn on. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 22: Ac/Dc Current Measurement

    Do not measure current greater than 10 A, otherwise the fuse will be blown. If you want to do AC current measurement, press the " " button to shift to AC current measurement function. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 23: Basic Concepts

    8.1.1 Example Calculate the current in this circuit. �� �� = Simply, we can use Ohm’s law: �� 3 �� = 0. 00588 �� = 5. 88 ���� 510 Ω Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 24 The measured resistance in this figure is 550.2 Ω. Note: Disconnect the battery when measuring the resistance, otherwise, the multimeter may be damaged. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 25 But in reality, it will be less than 5.61 mA because of the resistance of the multimeter itself: But indeed, we can count on our calculation “ ” because 5.88 mA is 3 �� / 510 Ω = 5. 88 ���� almost equal to 5.61 mA. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 26: Joule's Law For Electrical Power

    = 0. 0176 �� = 17. 6 ���� 510 ٠Let us see what we will get if we built this circuit in reality and calculate the power using the multimeter. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 27 = 0. 0176 �� = 17. 6 ���� We can count on our calculation “ ” because the 510 Ω theoretical value of 17.6 mW is near the value of 17.3 mW. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 28: Kirchhoff's Law

    15.9 mW 8.3 Kirchhoff's Law 8.3.1 Kirchhoff's Current Law Currents entering the node equals currents leaving the node. �� + �� = �� + �� ����1 ����2 ������1 ������2 Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 29: Kirchhoff's Voltage Law

    In this case, we are going to use Kirchhoff's law, we need to suppose the paths for off the current to use Kirchhoff's current law, and we need to suppose two loops to use Kirchhoff's voltage law. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 30 = − 0. 003957 �� Equation 4: �� = 0. 001363 �� − (�� · 0. 3091) �� = 0. 001363 �� − (− 0. 003957 �� · 0. 3091) Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 31 �� = 2. 7 �� The voltage on 47 Ω �� = �� · 47 Ω �� = 0. 00655 �� · 47 Ω �� = 0. 3 �� Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 32 The measured voltage around the 2.2 kΩ resistor is 6.087 V. Please see the set-up below. The measured voltage around the 680 Ω resistor is 2.887 V. Please see the set-up below. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 33: Shunt Resistor

    It is a way to measure current through a bath in the circuit using a small value resistor, we cut the circuit and connect it again using the shunt resistor. In most cases, it should be a high power resistor to handle the current passing through it. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 34: Example

    In this circuit, we are going to use a 7.5 Ω resistor as a shunt, and calculate the current using Ohm’s law. Now, we need to measure the voltage around the 7.5 Ω shunt resistor using the multimeter. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 35 = 0. 252 �� = 252 ���� 7.5 Ω Now, let us measure the current using the multimeter to compare it with our calculations. The measured current in this figure is 238 mA. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 36: Choosing The Right Resistor For An Led

    To calculate the resistor for an LED, we need to know the forward voltage for the LED, LEDs are different from the resistors, we need to limit the current passing through it because it does not work on Ohm’s law. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 37: Example

    Now, we need to build the circuit with a red LED, and we will use a high resistor, in our case, we will use a 2.2 kΩ resistor and measure the forward voltage using the multimeter. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 38 The measured voltage in this figure is 1.887 V DC And if we measure the current in this circuit. The measured current in this figure is 3.08 mA. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 39 Now, let us build the circuit again using a 330 Ω resistor and measure the forward voltage again and the current. The measured voltage in this figure is 2.007 V DC The measured current in this figure is 18.78 mA. 18.78 mA is so close to 20 mA. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 40: Measuring Internal Resistance Of A Battery

    ���� ● Now, we have the current and the voltage on the internal resistance, so we can calculate the �� = �� value of the internal resistor: �� ���� Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 41: Example

    Second, we connect a resistor with the battery and measure its voltage, in our case we will connect a 510 Ω resistor. The measured voltage in this figure is 8.59 V DC. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 42: Testing Some Components Using Multimeter

    8.7 Testing Some Components Using Multimeter In this section, we are going to test some components using a multimeter. 8.7.1 Potentiometer Test First, we need to measure the resistance between A - C. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 43 The measured resistance in this figure is 10.63 kΩ. The measured resistance in this figure is 40.82 kΩ. , which is almost equal to 50.82 kΩ 10. 63 ��Ω + 40. 82 ��Ω = 51. 45 ��Ω Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 44: Bjt Transistor Test

    Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 45 The measured forward voltage in this figure is 0.647 V. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 46 Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 47 The measured forward voltage in this figure is 0.647 V. Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 48 AC/DC Clamp Meter Meter 1999 Counts 3999 Counts SOLDERING KITS and SOLDERING KITS ACCESSORIES * Soldering Kit Model 0 Soldering Kit Model 1 Soldering Kit Model 2 Soldering Kit Model 3 Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 49 B. 2 colors (Red and Black) 12 Gauge Silicone Wire Kit Length / Number of Strands 3 m each color / 680 strands 8 m each color / 680 strands KITS FOR LEARNING ELECTRONICS Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...
  • Page 50 To know more about us and our products, please visit us in our official pages: www.plusivo.com https://www.facebook.com/plusivo/ For inquiries and assistance about distributorship, please reach us via email address: office@plusivo.com Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com...

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